[SilasX]

Funny that you bring that up, because that's actually happened! (Almost.) It's why alcohol-for-drinking is more expensive than alcohol-for-cleaning.

The government wanted to tax people it they drink it but not if they just clean with it. But then people (well, alcoholics mainly) realized they could buy the untaxed one "for cleaning" but then turn around and drink it. Can't have that!

End result: denatured alcohol, which (given taxes) is cheaper than the drinking kind because they "yuck it up" to the point that you can't drink it.

I just hope they don't do the analogous thing here, which would be like "poison you and hold the antidote at the ticket's final location" :-O